administrator
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Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 3:45 am

Hello,

Please have a look here:
http://www.airliners.net/testPhotoQuality.php

Type in the photo ID (with leading zeros if needed!) and check what different filters and jpeg quality settings does to your medium sized image. Find the optimum between size and quality and post here what settings you used. You can also link to the finished photos by checking their URL to prove your point.

I have to run now but if there's any problems, post here and I'll read it tomorrow.

Thanks!
Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
LGW
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 4:39 am

Huh? Man I am am dumb, what is this???

LGW
 
Sonic99
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 4:43 am


LGW,

Take a look at this thread for an explanation where Johan is coming from on this...

http://www.airliners.net/discussions/aviation_photography/read.main/47867/

Stephan
 
wietse
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 4:59 am

He is aware of that, (he posted in that thread)

What do you mean Ben?
Wietse de Graaf
 
gerardo
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 5:18 am

I tried the following:
-filter Triangle
-unsharp 1x

Result
- Size 22138 bytes (Original size 28335 bytes)
- Difference: 6197 bytes smaller than the original
pic can be seen at:
http://www.airliners.net/testPhotoQuality.php?5292

Anybody has other ideas?

Rgds
Gerardo
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airplanenut
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 5:29 am

186861:

JPG qual: 10
Unsharp: 1.5 ; 70
Noise rad: 1
Blur sigma: 45
Resize: lanczos

10,054 bytes smaller
Why yes, in fact, I am a rocket scientist...
 
LGW
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Answer

Sun Apr 21, 2002 5:30 am

I mean waht is it for and what does it do? and what info do u enter???

LGW
 
wietse
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 6:59 am

It helps improve image quality of the medium format pictures. Because of the resizing, some blurr and other unwelcome side effects are appearing. Normally, you counter these in Paintshop or Photoshop. These settings are here to improve the quality of the picture. You will find Unsharp Mask settings, blur settings, and other filters to improve the quality. We are asked to test the settings and (?) see what the best settings are?

Wietse
Wietse de Graaf
 
Dazed767
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OK...results....

Sun Apr 21, 2002 8:16 am

Digital Photo....
http://www.airliners.net/temp/temp_9101.jpg

-filter Lanczos -quality 75 -unsharp 2x

First: New file (Size 32910 bytes) - Second: Original (Size 33108 bytes):
The New file is 198 bytes smaller than the original (Good!)

Film.....
http://www.airliners.net/temp/temp_5660.jpg

-filter Lanczos -quality 75 -sharpen 1x

First: New file (Size 26456 bytes) - Second: Original (Size 26953 bytes):
The New file is 497 bytes smaller than the original (Good!)

Film was a &#(*$&# to get smaller and to look good. When you click the link for the Film one....it looks horrible (didn't look like that when I fixed it, what made it look so distorted?)
 
yegpix
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 10:50 am

I just prefer the old way. One size of the pic to view. If you have too small of a monitor (under 17") too bad. A lot of us have invested alot of time and money to upload pics sized at 1024 x 768 for A.net standards. Like the saying goes... If it aint broke, don't fix it. Just my 2 sense worth.
 Insane
 
cfalk
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 2:33 pm

Johan,

I think that we are kicking a dog that would be better left alone.

A "generated" photo will never be consistantly good - there are just too many variables - sharpness of the original, presence of cheatlines, etc.

So, instead of making the default view the medium view, which is of lower quality, how about adding a selector on the thumbnail view, where the person can select SMALL / MEDIUM / ORIGINAL (LARGE). In addition, I would recommend providing the pixel dimensions of the original picture, that way, a person who wants to see picture uploaded at 1400x1000 can decide whether he wants to wait for that big a file, or choose a smaller size. It also would imply that if you want the highest quality image, use the original size.

Cheers,

Charles
The only thing you should feel when shooting a terrorist: Recoil.
 
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Tonimr
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RE: Help Optimize Quality For Medium Sized Image

Sun Apr 21, 2002 8:04 pm

I agree with Charles, medium size only should be accesed if specifically required.

In addition, I think that the small size is too close to the first thumbnail -if not equal-, so it could be removed unless there's still enough people who selects the "No thumbnails" option.

Anyway it's a good idea to help the slower connection users.

Toni
There is a very fine line between 'hobby' and 'mental illness'.
 
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RE: Help Optimize Quality For Medium Sized Image

Mon Apr 22, 2002 8:23 pm

Two replies to the issue at hand? I thought you guys knew how to use digital image filters, you should know that it's an absolute must if you'd like to achieve the best in image quality.

I guess I'll have to do this myself then, don't complain if you don't like the quality of the medium sized image, you had your change to suggest settings.

Regards,
Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
Jan Mogren
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RE: Help Optimize Quality For Medium Sized Image

Mon Apr 22, 2002 8:52 pm

Johan,
>you should know that it's an absolute must if you'd like to achieve the best in image quality.<

That is the point! The best in image quality!
I don't beleive that can be accomplished with a standardized one-fits-all filter.
/JM

AeroPresentation - Airline DVD's filmed in High Definition
 
KingWide
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RE: Help Optimize Quality For Medium Sized Image

Mon Apr 22, 2002 8:52 pm

Johan,

this is probably too late for you but I used
resize Lanczos
Unsharp radius .2
and Unsharp sigma .4


this seemed to be pretty good. Not perfect but maybe a good starting point


J

Jason Taperell - AirTeamImages
 
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RE: Help Optimize Quality For Medium Sized Image

Mon Apr 22, 2002 10:08 pm

Jan,

Applying a filter can improve the quality of all photos. It won't be perfect but we'll get it as good as it can possibly be while keeping the bandwidth saving (ie file size) benefits. People will open your large version photos if they want excellent quality.

I intend to prove in a short while that quality can be improved across all photos.

/ Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
administrator
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 12:03 am

Ok, please try these settings:

JPEG Quality: 85
Unsharp Mask Radius: 0.2
Unsharp Mask Sigma: 150
Blur Sigma: 100
Blur Radius: 0.3
Resize filter: Lanczos

Leave other fields in no or empty.

So, what do you think? Filesize is normally slightly increased but have a look at the thumbnail version as well. You'll notice that the new version looks better and is normally smaller than the old version. So I think the smaller thumbnail counters the bigger medium sized photo.

I'm going away to eat at a friend and will be back in two hours or so and unless someone objects, I'll start the scripts that will make the changes.

Thanks,
Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
administrator
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 12:05 am

Just one small thing. You might wonder why we add that blur after the sharping. It's to save space, although the blurring isn't visible, jpeg manages to compress the file better resulting in a smaller file.

/ Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
Jan Mogren
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 1:18 am

I tried those figures and this one comes out pretty jaggy
http://www.airliners.net/temp/temp_4812.jpg

This one is so sharp I dare not look at it  Wink/being sarcastic at Unsharp Mask Radius 0.2
http://www.airliners.net/temp/temp_3156.jpg


here is 0.1 instead. A bit smoother on the eyes and less jaggies
http://www.airliners.net/temp/temp_9766.jpg

/JM
AeroPresentation - Airline DVD's filmed in High Definition
 
PH-OTO
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 6:22 am

Well I'm not an expert in this area but I am not happy with this:
http://www.airliners.net/temp/temp_9303.jpg
BTW I tried Johan's Settings

OK; the photo is not as sharp in itself as Jan's photo, because the plane is driving on the runway and is photographed form a greater distance but that is the case with most photos in the database. When you look at the original it is reasonably sharp. Am I doing something wrong here?

Johan, are you already uploading the new scripts? And are you prepared to change it one more time if we come up with something even better? If so, I will play with it a little more in the next few days.

How did your friend taste Johan? Wink/being sarcastic

Martin Boschhuizen
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 7:23 am

Martin,

I've changed some variables in the script so the above is not valid anymore, please try this instead:

convert -despeckle -resize \"640x640>\" -unsharp 0.2x150 -blur 0.2x0.3 -quality 80 $jpgfile /ready/$jpgfile

Regards,
Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)
 
PH-OTO
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 6:45 pm

Ok, that seems to work well. I haven't found a setting that produces better results, so I guess that this is pretty much it.

Still I have the feeling to be thrown back into the stone ages with these file sizes. Files made at 1024*768 simply do not look good when they are rezised to a smaller output. Looking at it from the bright side; my father wil be able to view my pictures better; he runs his monitor at 640*480

Martin
Look very closely between the lines of this message, and you will see the captain beating up the jumpseater
 
Guest

RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 7:08 pm

The medium versions do look much better now.
....but, there is no copyright banner on the bottom?
Are the 640 px wide pictures too small to matter?

Cheers

Gerry
 
Guest

RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 7:09 pm

... funny, some have the copyright banner, some don't?
Bug?

Gerry
 
administrator
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RE: Help Optimize Quality For Medium Sized Image

Tue Apr 23, 2002 7:31 pm

The medium versions should have copyright banners, there was a bug in the upload script that caused them not to. All medium and small sized photos are currently being redone with the new resize and filter settings so the copyright banner will be added. It will take some time though, I started the filter script last night and it's processed less than one hundredths of all photos...

Regards,
Johan
Working on the site from morning 'till night that's livin' alright (1997-2007)

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